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Finding the Fourth Proportional to 485,027.20, 727,540.80 and 272,450.80

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Solution

The fourth proportional to 485,027.20, 727,540.80 and 272,450.80 is: 408,676.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,027.20 : 727,540.80 = 272,450.80 : x
  2. Step 2: Convert to fraction form
    485,027.20/727,540.80 = 272,450.80/x
  3. Step 3: Cross multiply
    485,027.20x = 727,540.80 × 272,450.80
  4. Step 4: Simplify right side
    485,027.20x = 198,219,072,992.64
  5. Step 5: Solve for x
    x = 198,219,072,992.64/485,027.20
  6. Step 6: Final answer
    x = 408,676.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.